all those present _______ he began his lecture.When all those present ___ he began his lecture.A.sit B.set C.seated D.were seated这题选c还是d啊,为什么?
问题描述：
all those present _______ he began his lecture.
When all those present ___ he began his lecture.
A.sit B.set C.seated D.were seated
这题选c还是d啊,为什么?
答
选 C
答
D When all those present were seated,he began his lecture.
翻译：当所有在场的人就座后，他开始了演讲/讲课。
解释：seat 表示“使坐下，使就座”，是及物动词，后要接宾语。这里用被动主语，seat的宾语就是前面的all those present。when引导时间状语从句，he began his lecture是主句。
答
很显然是选D，when是时间状语从句，必须要有动词，而考虑到主语所以要选择被动语态
答
D 语法上CD都可以，但是考虑到those已经有后置定语present了，就用完整形式，以免后置定语重复
答
D be seated表示“就座”.句意：当所有出席者就座后,他开始讲课.